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Scientific Calculator

By , 11 Mar 2008
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Scientific_Calculator

Introduction

This is a scientific calculator that calculates fibonacci modulo factorial sin cos tan.. you are also able to change the background color and color of the buttons.

Using the Code

// using button number 1
private void button1_Click(object sender, EventArgs e)
{
    but_backspace.Enabled = true;        // number button is clicked, enable backspace
    but_backspace.BackColor = Color.LightCoral; // color button when enabled

    if (isOperation == true)          // if we used an operation clear output
        {textBox_output.Text = "";}   // empty output

    if (tempSign == "Sminus")
        { textBox_output.Text += "-1"; }

    else
        textBox_output.Text += "1";    // add 1 to output
        isOperation = false;           // no operation pressed yet
}

// using addition button
private void button12_Click(object sender, EventArgs e)
{
    if (textBox_output.Text == "")
    { // to prevent exception appearing
    }
    else
    {
        Operations.add(double.Parse(textBox_output.Text));
        textBox_output.Text = Convert.ToString(Operations.getResult());
        isOperation = true; // user pressed an operation
        tempSign = "plus";
    }
}

// factorial method
public static long factorial(long num)
{
    if(num >= 21 || num < 0)
    {
        MessageBox.Show("Enter number between 0 & 20",
        "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return 0;
    }
    else
    {
        if(num <= 1)
            return 1;
        else
            return num * factorial(num - 1); // recursive function
    }
}

History

  • 11th March, 2008: Initial post

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Ramzi987654321
Software Developer
Liberia Liberia
No Biography provided

Comments and Discussions

 
SuggestionAppreciation And Suggestion PinmemberRushan Arshad12-Feb-14 2:38 
Questiongood Pinmemberalaafawakiri22-Oct-12 2:04 
GeneralMy vote of 1 PinmemberClifford Nelson22-Aug-12 13:53 
GeneralNice Calculator Pinmemberle uyen14-Aug-11 16:53 
JokeChange "." for "," PinmemberÁngel Manuel García Carmona21-Dec-10 10:43 
NewsThank you PinmemberPouriya.GH27-Mar-10 13:27 
GeneralMy vote of 2 Pinmemberwmostafa22-Dec-09 20:24 
GeneralUseful PinmemberEthnica6-Nov-09 21:18 
GeneralBravo PinmemberElissar22-Mar-08 3:50 
GeneralExcellent Pinmemberabou el ror22-Mar-08 3:44 
Generaljust to let you know... [modified] Pinmvptoxcct11-Mar-08 4:53 
GeneralRe: just to let you know... PinmemberRamzi Abou Rahal11-Mar-08 4:55 
GeneralRe: just to let you know... Pinmvptoxcct11-Mar-08 4:57 

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